DOMINANT LETHALITY AND CORRELATED CHROMOSOME EFFECTS IN HABROBRACON EGGS X-RAYED IN DIPLOTENE AND IN LATE METAPHASE I
Open Access
- 1 August 1945
- journal article
- research article
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 89 (1) , 61-71
- https://doi.org/10.2307/1538083
Abstract
Unlaid Habrobracon eggs x-rayed in diplotene (lethal dose about 45,000 r) and allowed to develop parthenogenetically, show fragments, bridges or both in division I; either or both in division II. Bridges in division I may be permanent. Unlaid eggs x-rayed in late metaphase I (lethal dose about 1,400 r) show fragments but no bridges in division I; bridges, fragments or both in division II. An explanation of difference in cytological effects of x-rays on these stages and of differences between them in sensitivity and in nature of survival curves is attempted through comparision with studies on forms with larger chromosomes.This publication has 14 references indexed in Scilit:
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